写出下列词语的近义词
壮观____格外____眺望____
顿时____欺侮____表明____
听短文, 根据短文内容完成下列表格。
Things some people do on the __(1)____
they spend only ____(2)____.
They ___(3)____ to give their seats to the old people without listening to the ticket sellers.
Be ___(4)____ and help the persons in need of help.
Things we should do
Give your seats to the people with ____(5)____ and let old people get on or get off before you.
小明骑自行车去上学,他在前一半路程的速度为4m/s,他感觉要迟到了,便用6m/s的速度走完了后一半路程,那么他在整个路程中的平均速度是____ 。
已知R上可导函数f(x)的图象如图所示,则不等式(x2﹣2x﹣3)f′(x)>0的解集为( )